5 years ago

Dynamics of Semiflexible Polymer Solutions in the Tightly Entangled Concentration Regime

Dynamics of Semiflexible Polymer Solutions in the Tightly Entangled Concentration Regime
Manlio Tassieri
I corroborate an important experimental evidence reported by Schuldt et al. [ Phys. Rev. Lett. 2016, 117, 197801] revealing the incapability of the current theoretical framework to fully describe the dynamics of semiflexible polymer solutions in the tightly entangled concentration regime. These results have been endorsed here by means of previously published, but overlooked, data by Tassieri et al. [ Phys. Rev. Lett. 2008, 101, 198301; Biophys. J. 2008, 94, 2170]. The ensemble of information provides a strong evidence that the scaling law of the plateau modulus as a function of polymer’s concentration and persistence length, i.e., G0cαLpβ, should have both the exponents positive, in contrast with all the existing predictions converging on similar values of α > 0 and β < 0—hence the need of new theoretical models able to better interpret the contribution of the polymer bending rigidity to the viscoelastic properties of the polymer network.

Publisher URL: http://dx.doi.org/10.1021/acs.macromol.7b01024

DOI: 10.1021/acs.macromol.7b01024

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